<!-- ＜（＾－＾）＞ -->
<!-- 2023年1月15日15点33分，TalentO_o -->
<!-- HTML5的自定义属性data-sth，通过event.target.dataset.sth获取到 -->
<template>
  <div class="type-nav">
    <div class="container" @mouseenter="enterShow" @mouseleave="leaveShow">
      <h2 class="all">全部商品分类</h2>
      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
      <div class="sort" v-show="show">
        <div class="all-sort-list2" @click="goSearch">
          <div class="item" v-for="c1 in categoryList" :key="c1.categoryId">
            <h3>
              <a :data-categoryName="c1.categoryName" :data-category1Id="c1.categoryId">
                {{ c1.categoryName }}
              </a>
            </h3>
            <!-- 二级、三级分类 -->
            <div class="item-list clearfix">
              <div class="subitem" v-for="c2 in c1.categoryChild" :key="c2.categoryId">
                <dl class="fore">
                  <dt>
                    <a :data-categoryName="c2.categoryName" :data-category2Id="c2.categoryId">
                      {{ c2.categoryName }}
                    </a>
                  </dt>
                  <dd>
                    <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                      <a :data-categoryName="c3.categoryName" :data-category3Id="c3.categoryId">
                        {{ c3.categoryName }}
                      </a>
                    </em>
                  </dd>
                </dl>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {mapState} from 'vuex'

export default {
  name: 'TypeNav',
  data() {
    return {
      show: true
    }
  },

  mounted() {
    if (this.$route.path != '/home') {
      this.show = false
    }
    /**
     * 2023年1月15日15点32分
     * TalentO_o
     */
    // 请求三级联动的数据，存储到vuex
    this.$store.dispatch('categoryList')

  },
  methods: {
    goSearch(event) {
      // 在标签中加入data-sth，当触发某个事件的时候，可以通过event.target.dataset.sth找到
      // 例：<a :data-categoryName="c1.categoryName" :data-category1Id="c1.categoryId">
      let {categoryname, category1id, category2id, category3id} = event.target.dataset
      if (categoryname) {
        let location = {name: 'search'}
        let query = {categoryName: categoryname}
        if (category1id) {
          query.category1Id = category1id
        } else if (category2id) {
          query.category2Id = category2id
        } else {
          query.category3Id = category3id
        }
        location.query = query
        this.$router.push(location)
      }
    },
    // 鼠标移入，商品分类列表显示
    enterShow() {
      this.show = true
    },
    leaveShow() {
      if (this.$route.path != '/home') {
        this.show = false
      }
    }
  },
  computed: {
    ...mapState({
      // 获取存放在
      categoryList: (state) => {
        return state.home.categoryList
      }
    })
  }
}
</script>

<style scoped lang="less">
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          height: 27px;

          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 0 0 40px;
            margin: 0;

            a {
              float: left;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          transition: background-color 0.2s ease;

          &:hover {
            background-color: #e1251b;

            h3 {
              a {
                color: #fff;
                cursor: pointer;
              }
            }

            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
</style>
